Screen-door shoo-fly attachment



F b, 3. I 925.

W. M. SMITH ET AL SCREEN DOOR SHOOF'LY ATTACHMENT Filed Oct. 18, 1921JMZ as 6.10, MM

Patented Feb. 3, i925.

Estates UNETED STATES PATENT QFFKIE.

WILLIAIVI li'i. SMITH AND PAUL N. SMITH, OE OELTUEIN, IOWA.

SCREEN-DOOR SHOO-FLY ATTACHMENT.

Application filed October 18, 1921.

To all whom it may concern:

Be it known that we, WILLIAM M. SMITH and PAUL WV. SMITH, citizens ofthe United States, residents of Oelwein, in the count-y of Fayette andState of Iowa, have made a certain new and useful Invention in Screen-Door Shoo-Fly Attachments; and we declare the following to be a full,clear, and exact description of the same, such as will enable othersskilled in the art to which it appertains to make and use the invention,reference being had to the accompanying drawings, and to letters orfigures of reference marked thereon, which form a part of thisspecification.

Figure 1 is a side view of the invention, as applied.

Figure 2 is a side View on a larger scale showing the parts of theinvention, partly broken away.

Figure 3 is a top plan view of the invention, as applied.

Figure L is a section on the line 4-4 Figure 1.

Figure 5 is a detail perspective View of the pulleys located in theangle of the door casing.

The invention has relation to attachments to screen doors, designed toprevent the entrance of flies to the house when the door is opened and,through the agitation of the fan, to cause any flies upon or suficientlynear the door to be shooed out of the open doorway, the object of theinvention being an improved device of simple construction and operation.

The invention consists in the novel con struction and combinations ofparts as hereinafter set forth.

In the accompanying drawings illustrating the invention, the numeral 2designates a screen door, 3 the door casing, and 4 a revoluble Shoo-flyor fan rotatable in bearings 5 of said casing, the fan being located onthe inside of the door casing and screen door.

An upright coiled spring 6 is attached at its lower end to an eye 7secured to the side of the door casing adjacent to the hinges of thescreen door, and to the upper end of the spring is connected a flexiblecord or line 8, extending upwardly in a vertical di- Serial No. 508,572.

motion or substantially vertical direction and being coiled at 9 oncearound the rotatable shaft 4 of the fan, thence passing again upwardlyover a vertical guide pulley 10 secured to the top of the door casing,and at right angles around a horizontal guide pulley 11 adjacent to thevertical pulley, and then passing horizontally towards the centerportion of the doorway, and at right angles around a second horizontalpulley 12 secured to the top of the door casing, and at its end beingsecured to an eye 13 secured to the upper portion of the screen doornear the center of the upper rail or frame bar thereof. The adjacentvertical and horizontal pulleys 10 and 11 are preferably mounted upon asingle bracket 14.

The invention also acts to automatically close the screen door, once itis opened, and is applicable to screen doors swinging in cit-herdirection or hinged at either side.

An ordinary coiled spring such as is commonly used to close screen doorsis used in the present case, and is of advantage in that it holds itstension well, and in that the tension may be adjusted to suit conditionsby adjusting the length of the cord or line. The spring being locatedvertically at the side of the door casing at the hinge side is out ofthe way and will notin any manner disturb passengers going in and out.

An extensible coiled spring pulled out or extended in the opening of thedoor has been found most efficient in practice, and is preferred to anyother form of spring.

We claim A screen door closer and shoe-fly attachment, consisting of ahorizontal revoluble fan, having its axis parallel to the door andhaving journal bearings located adjacent to and spaced from the top ofthe inner side of a door casing, an angular frame adapted to fit intoone of the upper corners of the door frame, bearing pins on said angularframe extending at right angles to each other, an upright coiled springhaving its lower end secured to the side of said casing adjacent thedoor hinges, a vertical pulley and a horizontal pulley located adjacenteach other and to the hinge side of the door above said fan and mountedupon the said bearing pins, a second horizontal pulley above said fan,and a flexible cord connected In testimony whereof we afiix our signaatits lower end to said spring and passing tures, in presence of twowitnesses.

thence directly around the shaft of said fan, v thence directly aroundsaid adjacent verti- WVILIAM M. SMITH.

cal and horizontal pulleys and thence di- PAUL WV. SMITH rectly aroundsaid last named horizontal pul- Vitnesses: ley, and at its other endhaving connection EDWARD B. FnUsTnLLnT,

with the screen door. J. Goon.

